Shim Kit Mopar 8-3/4 w/489 Casting

The Shim Kit Mopar 8-3/4 w/489 Casting by Allstar Performance is a vital component for Mopar enthusiasts engaged in building or rebuilding high-performance rear axles. This kit is specifically designed to adjust bearing preload and eliminate side play in 8-3/4-inch differentials equipped with the 489 casting. Proper shim selection is crucial for enhancing differential longevity and ensuring optimal power delivery.

The shim kit includes precision-ground, stainless steel shims of varying thicknesses that are placed between the bearing races and the differential housing. By fine-tuning bearing preload, this kit helps to maintain proper gear mesh alignment, which is essential for effective torque transmission from the engine to the wheels. The materials and design of the shims contribute to reduced noise and improved performance.

Ideal for mechanics and builders performing complete differential rebuilds, upgrades, or bearing replacements, this shim kit is compatible with factory and performance Mopar differentials from the Dodge and Plymouth lineage. Proper installation requires differential knowledge, including setting backlash and preload to manufacturer specifications using appropriate tools.